In my opinion, artificial intelligence should be kept away from humans’ civilisation.

OK, here are two specimens – a human (Bill), and an alien (Zarka). If I talk about the human, I’m talking about the gentleman on the left. If I talk about the alien, I’m talking about the lady on the right.

Bill and Zarka

We can say that the human’s nose is longer than the alien’s nose, and the human’s neck is thicker than the alien’s. Also, since the alien has no body hair, we can assume that the alien is interested in human hair.

Let’s look at the grammar.

I use the possessive when I’m talking about a particular human (Bill) or a particular alien (Zarka). I could also be talking about a specific group of humans or aliens.

On the other hand I don’t use a possessive when I’m talking about all humans (their hair). The alien is interested in the phenomenon of hair as it grows on all humans, everywhere.

When you’re using ‘human‘ as a noun modifier, stop and think! Are you referring to an individual human or a specific group of humans? Or are you talking about all humans? Only add the possessive if your reader knows exactly which human (or specific group of humans) you are referring to.